Attached is save file from when I launched my world post-today's update, which also contains the server log. Also attached the client log.
Newly generated worlds have tons of Densely Populated Salt Stacks areas (10-15 salt stacks with like 2 salt stack areas next to each other or something?).
Retrofitted worlds have 3-4 salt stacks and only 1 salt stack area.
In my case, one of the Salt Stack areas one only had 1 Salt Stack in it.
(That's how I can best describe it. Map reveals better indicate what I mean).
Steps to Reproduce
Play today's update on a pre-exisiting world. Reveal Map. Compare to a freshly generated world. Cry.
Status: Known Issue
We are aware of this issue and have it logged internally but either we do not have a fix ready yet or we are not planning on addressing the issue in the immediate future.